Choose the most powerful server that you can afford. If speed is a factor, a more powerful server will deliver your messages faster. If budget is limited, a less powerful server may still get your message out in an acceptable time frame.
Actual throughput with Spotlight Mailer will be less based on the other factors which affect sending rate: SSL, Message size, Recipient server and DNS performance, blacklisting and greylisting, and any additional processing being performed (e.g. anonymization or encryption).
For some customers, the speed of sending is very important. There are two significant modes of sending:
Sending speed is important for customers who need to send large mailings at a sustained rate. Understanding sending speed helps you determine how long it will take to send that blast to 100,000 subscribers.
There is a theoretical maximum number of messages/hour that any server can manage. How fast you can actually send is affected by a number of factors.
LuxSci Spotlight Mailer is a very efficient program.
LuxSci Spotlight Mailer uses SMTP Pipelining.
LuxSci Spotlight Mailer does not use SSL by default as the connections are between LuxSci servers behind LuxSci's firewalls. SSL is not needed in this case.
The recommended number of concurrent connections for best results in sustained sending are given for each server type on the Pricing page.
Note, however, that if you use more concurrent connections that is recommended, then you are likely just over-working your server. That results in your sending rates actually getting slower. Stick to the recommended number of concurrent connections.
LuxSci Spotlight Mailer uses 4 concurrent connections for all customers - dedicated or shared. However, due to the lack of network speed issues slowing down each Spotlight Mailer connection, this behaves effectively like 8 concurrent connections.
For example, LuxSci Spotlight Mailer sends from a server right next to your outbound email servers and thus network speed is not a factor. For someone connecting from outside of LuxSci or internationally, the speed can slow down significantly.
You can get around this recipient slowness issue by using our "Anonymous SMTP" ports (587, 6025, and 6465). In this case your messages are immediately queued on our servers and delivered "later". This does not speed up the actual time to when the recipients get the messages (it will in fact slow that down); however, it will speed up the rate that your email marketing program delivers those messages to our servers.
Additionally, if each message contains only recipients in a specific domain, then actual delivery to these recipients will be expedited by this efficiency. E.g. If you are sending to 500 AOL users, instead of sending 500 individual messages, send one message with all 500 AOL users listed as "BCC" recipients. Delivery will be almost 500 times faster.
I wanted to congratulate you on your service; the reduction in Spam is incredible, and the speed of delivery is stunning. I am recommending you to all of my friends and associates! You can quote me on that!"
LuxSci is a very unusual company in the respect that if you ask support for a technical help, NOTHING is ever insurmountable to them. From a 1 to a 10, they are twelve!"
I am extremely satisfied with your security features and with the extent of knowledge of your support staff. You provide a solid, reliable service and also manage to continue to add more thoughtful features -- all at a reasonable price."
We use your High Volume SMTP service for our automated invoicing and purchase confirmations, so it is a critical part of our business. Your bulk SMTP has been the most reliable and cost effective I have used. The technical and sales support have been timely, efficient, and effective. I highly recommend."
The difference between a quality service provider and the rest is how they respond when things are not working. Being able to get someone on the phone after hours to sort out issues promptly is key. LuxSci delivered on their support promises in every respect."